:root {
  --bg: #fbfaf8;
  --surface: #ffffff;
  --text: #1b1f27;
  --muted: #586070;
  --line: #e4e1db;
  --sos: #d92d20;
  --sos-soft: #fde7e4;
  --on-sos: #ffffff;
  --warn-bg: #fff4d6;
  --warn-text: #5c4300;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12151b;
    --surface: #1b2029;
    --text: #eef0f4;
    --muted: #a3acbb;
    --line: #2c3340;
    --sos: #f0564a;
    --sos-soft: #3a1c1a;
    --on-sos: #ffffff;
    --warn-bg: #3a3014;
    --warn-text: #f5dd9a;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-text-size-adjust: 100%;
}

.top, main, footer {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 20px;
}

.top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 20px;
  padding-bottom: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.mark { width: 28px; height: 28px; }
.mark-ring { fill: var(--sos-soft); }
.mark-core { fill: var(--sos); }

.lang { display: flex; gap: 4px; }

.lang button {
  padding: 6px 12px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: none;
  color: var(--muted);
  font: inherit;
  font-size: 0.9rem;
  cursor: pointer;
}

.lang button:hover { color: var(--text); }
.lang button[aria-pressed="true"] { border-color: var(--line); background: var(--surface); color: var(--text); }
.lang button:focus-visible, .brand:focus-visible { outline: 2px solid var(--sos); outline-offset: 2px; }

.hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: center;
  padding: 40px 0 56px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--sos);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 20px;
  font-size: clamp(2rem, 6vw, 3.4rem);
  line-height: 1.1;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

.lead { margin: 0 0 24px; max-width: 34em; color: var(--muted); font-size: 1.15rem; }

.status {
  display: inline-block;
  margin: 0;
  padding: 8px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  font-size: 0.95rem;
  font-weight: 600;
}

.hero-art { display: grid; place-items: center; min-height: 240px; }

.pulse {
  position: relative;
  display: grid;
  place-items: center;
  width: 168px;
  height: 168px;
  border-radius: 50%;
  background: var(--sos);
  color: var(--on-sos);
  box-shadow: 0 12px 40px rgba(217, 45, 32, 0.35);
}

.pulse b { position: relative; font-size: 2.4rem; letter-spacing: 0.06em; }

.pulse span {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--sos);
  opacity: 0;
  animation: ring 2.8s ease-out infinite;
}

.pulse span + span { animation-delay: 1.4s; }

@keyframes ring {
  0% { transform: scale(1); opacity: 0.35; }
  100% { transform: scale(1.75); opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .pulse span { animation: none; }
}

section:not(.hero) { padding: 40px 0; border-top: 1px solid var(--line); }

h2 { margin: 0 0 24px; font-size: 1.6rem; letter-spacing: -0.015em; }
h3 { margin: 0 0 6px; font-size: 1.05rem; }
section p { margin: 0; color: var(--muted); }

.steps, .cards, .points {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.steps { counter-reset: step; }

.steps li {
  position: relative;
  padding-left: 56px;
  counter-increment: step;
}

.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--sos-soft);
  color: var(--sos);
  font-weight: 700;
}

.cards li {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
}

.notice {
  margin: 16px 0 48px;
  padding: 16px 20px;
  border-radius: 14px;
  background: var(--warn-bg);
  color: var(--warn-text);
  font-weight: 600;
}

.notice p { margin: 0; }

footer {
  padding-top: 24px;
  padding-bottom: 40px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

footer p { margin: 0; }

@media (min-width: 640px) {
  .steps { grid-template-columns: repeat(3, 1fr); gap: 32px; }
  .steps li { padding: 56px 0 0; }
  .cards, .points { grid-template-columns: repeat(2, 1fr); }
  .points { gap: 28px 40px; }
}

@media (min-width: 900px) {
  .hero { grid-template-columns: 1.4fr 1fr; padding: 72px 0 88px; }
  .cards { grid-template-columns: repeat(3, 1fr); }
}